
class Observer:
    def sys_message(self):
        pass

class Color:
    GRAY = (0.7,0.7,0.7)
    BLACK = (0,0,0)
    WHITE = (1,1,1)
    RED = (1,0,0)
    GREEN = (0,1,0)
    BLUE = (0,0,1)
    YELLOW = (0,1,1)
    
from pyglet.window import key
key = key
